There used to be a trick a while back where a company used to bring in Cosworth Escorts into California and register them. Some how they were able to bring them in as Cosworth Escorts and not Ford Escort Cosworth. Since Cosworth wasn't considered a mass car producer it didn't need to have DOT crash test studies done in the US, they just needed to basically pass emissions. It was basically registered the same way you would a kit car. Or something like that.